January 2023 - vsnet-alert - ooruri.kusastro.kyoto-u.ac.jp

[vsnet-alert 27342] PNVJ06245297+0208207: please continue observations
by Taichi Kato 22 Jan '23

22 Jan '23

PNVJ06245297+0208207: please continue observations Still staying around 18 mag. Expected to brighten and show superhumps (superhumps may already be present now). YYYYMMDD(UT) mag observer 20221231.8045 <15.639g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20221231.8057 <15.712g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20221231.8070 <15.626g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20221231.9034 18.797o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.9115 18.821o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20221231.9183 18.974o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230101.9671 <15.986g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.8427 <15.422g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.8440 <15.377g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.8452 <15.469g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.9009 <15.832g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.9022 <15.701g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230102.9034 <15.627g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230103.1303 18.350o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230103.1335 18.380o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230104.1302 <15.562g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1314 <15.561g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1326 <15.533g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1605 <15.104g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1618 15.552g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230104.1631 <15.532g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230105.2853 12.320g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230105.2865 12.301g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230105.2878 12.407g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230107.7004 12.35V (Masayuki Moriyama) 20230107.7018 12.16B (Masayuki Moriyama) 20230107.7032 12.16Rc (Masayuki Moriyama) 20230107.7048 12.23Ic (Masayuki Moriyama) 20230108.7298 12.76C (Masayuki Moriyama) 20230109.9929 15.07C (Masao Funada) 20230110.474 16.98C (Hiroshi Itoh) 20230110.4794 16.68V (Katsumi Yoshimoto) 20230110.514 <150 (Hiroyuki Maehara) 20230110.6169 169:C (Masayuki Moriyama) 20230111.633 17.66C (Hiroshi Itoh) 20230112.641 17.48C (Hiroshi Itoh) 20230113.646 17.86C (Hiroshi Itoh) 20230116.590 17.76C (Hiroshi Itoh) 20230120.547 17.92C (Hiroshi Itoh) 20230120.621 <150 (Hiroyuki Maehara)

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[vsnet-alert 27341] PNVJ00215475+5231007: period of ordinary superhumps
by Taichi Kato 22 Jan '23

22 Jan '23

PNVJ00215475+5231007: period of ordinary superhumps Period of superhumps (mostly stage A) is 0.05625(4) d. contributors: Zubareva's team, Kyoto U. team, Itoh-san, Kiyota-san and Tamas Tordai.

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[vsnet-alert 27340] ASASSN-16ga: new SU UMa-type dwarf nova
by Taichi Kato 22 Jan '23

22 Jan '23

ASASSN-16ga: new SU UMa-type dwarf nova Josch Hambsch has reported observations on two nights. Superhumps were apparent on Jan. 20 and 21. The period will be determined as more observations become available (relatively long).

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[vsnet-alert 27339] ASASSN-23af: new SU UMa-type dwarf nova
by Taichi Kato 22 Jan '23

22 Jan '23

ASASSN-23af: new SU UMa-type dwarf nova Josch Hambsch has reported observations on two nights. Superhumps were apparently growing on Jan. 20-21. The period will be determined as more observations become available (around 0.06 d).

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[vsnet-alert 27338] PNVJ00215475+5231007: ordinary superhumps
by Taichi Kato 21 Jan '23

21 Jan '23

PNVJ00215475+5231007: ordinary superhumps Based on observations by Zubareva's team and Kyoto U. team, this object started showing ordinary superhumps on Jan. 17.

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[vsnet-alert 27337] ASASSN-V J202511.39+250535.3 large-amplitude dwarf nova state
by Taichi Kato 20 Jan '23

20 Jan '23

ASASSN-V J202511.39+250535.3 large-amplitude dwarf nova state According to Moriyama-san and ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), this IW And star has been showing large-amplitude dwarf nova outburst (4 mag) since 2022 (dwarf nova state in 2021 with smaller amplitudes).

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[vsnet-alert 27336] DDE 35 sudden brightening, UGZ+VY Scl
by Taichi Kato 20 Jan '23

20 Jan '23

DDE 35 sudden brightening, UGZ+VY Scl Kyoto U. team reported sudden brightening of DDE 35 on Jan. 18. Looking at ATLAS forced photometry (Tonry et al. 2018; Shingles et al. 2021), this object has been showing dwarf nova outburst since 2022. I have adopted a classification of UGZ+VY Scl. Recent data: YYYYMMDD(UT) mag observer 20230103.583 162C (Mitsutaka Hiraga) 20230107.824 164C (Mitsutaka Hiraga) 20230107.8295 159C (Masayuki Moriyama) 20230108.617 162C (Mitsutaka Hiraga) 20230110.594 166C (Mitsutaka Hiraga) 20230111.538 166C (Mitsutaka Hiraga) 20230115.5038 16.469o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.5057 16.812o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.5209 17.359o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.5259 16.769o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.5914 14.469o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.5951 14.484o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.6005 14.478o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230119.6358 14.501o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27335] Re: 6dFg0752425-545120 outburst
by Taichi Kato 19 Jan '23

19 Jan '23

Re: 6dFg0752425-545120 outburst This was an outburst in 2022 Dec. Well captured by ATLAS -- SS Cyg-type outburst.

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[vsnet-alert 27334] ASASSN-23af = TCP J05361640-3151065 early data
by Taichi Kato 19 Jan '23

19 Jan '23

ASASSN-23af = TCP J05361640-3151065 early data YYYYMMDD(UT) mag observer 20230112.2959 <15.977g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230112.2972 <15.963g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230112.2985 <16.116g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.1380 14.191o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.1409 14.168o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.1471 14.153o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.1567 14.136o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230113.1851 13.742g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.1864 13.717g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.1876 13.702g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.3165 13.424g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.3177 13.389g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230113.3190 13.399g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.1580 13.635o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.1607 13.652o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.1663 13.617o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.1725 13.237g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.1738 13.262g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.1751 13.289g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.1776 13.632o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.2053 13.247g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.2065 13.271g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.2078 13.278g (ASAS-SN survey (Shappee+ 2014; Kochanek+ 2017)) 20230114.9077 13.440c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.9109 13.437c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.9145 13.460c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.9192 13.457c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230114.9273 13.434c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.8715 13.560c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.8746 13.537c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.8803 13.568c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230115.8914 13.584c (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230117.1355 13.920o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230117.1393 13.963o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230117.1447 13.716o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230117.1559 13.956o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230118.1149 14.221o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230118.1190 14.232o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230118.1253 14.189o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505)) 20230118.1361 14.072o (ATLAS Forced Photometry (Tonry+2018, PASP 130, 064505))

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[vsnet-alert 27333] TCP J05361640-3151065 = ASASSN-23af
by Taichi Kato 19 Jan '23

19 Jan '23

TCP J05361640-3151065 = ASASSN-23af

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vsnet-alert January 2023